1. Productivity and the Environment, OECD Green Growth Studies,2015
2. The EIB Circular Economy Guide: Supporting the circular transition. 1. Kirchberg: European Investment Bank, 2020. ISBN 9789286146718.
3. Walter, Denise REIKE a Sjors WITJES;VERMEULEN;Circular Economy 3.0 - Solving confusion around new conceptions of circularity by synthesising and re-organising the 3R's concept into a 10R hierarchy,2019
4. The circular economy: New or Refurbished as CE 3.0? — Exploring Controversies in the Conceptualization of the Circular Economy through a Focus on History and Resource Value Retention Options. Resources;REIKE;Conservation and Recycling,2018